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HF Propagation


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80m Projects - Transmitters

Click to enlarge"Easy Ten" - A simple 80 Meter CW Transmitter Using A 2N3904 by K7NS
I call this very simple transmitter the "Easy Ten" because it can be easily heard at a distance of 10 miles. Transmitter antenna is a random length wire run through a hole in the wall and thrown into a tree.

Click to enlarge25 part transmitter for the QRP Minimal Art Session by LA3ZA
My Minimal-Art-Session rig shown here was made for class B of the QRP-MAS competition which is in May every year. In class B the transmitter should have a maximum of 50 components, and the fewer the number of components, the more points one will get per contact. With such simple rigs, only CW is viable.

Click to enlarge3.5MHz ARDF Transmitter by ON7YD
This transmitter is designed as a classic 3 stage TX.

Click to enlarge3.5MHz Low PowercARDF Transmitter by ON7YD
This low power transmitter is developed for ARDF exercising purposes but of course can be used as super QRP transmitter either.

Click to enlarge80 Meter Tube Transmitter by SM5GNN
This is a variation of the triode/pentode family of glowbug transmitters. It features a Pierce oscillator which runs continously during transmit to avoid chirp.

Click to enlarge80 Metre DSB Transmitter by VK3YE
This circuit is probably the simplest practical 'bare-bones' voice transmitter for the 3.5 MHz amateur band.

Click to enlarge80-meter CW Transmitter by K9PPW
This is a schematic of Bob's homebrew QRP transmitter. It's CW on 80 meters, about 1 watt output, VFO ... and only uses TWO rf transistors and one more for keying. It was built as an experiment to see what you could get out of ONE transistor (about 250 mw with no chirp) and the "shoes" were added later to get a whopping one watt of rf out.

Click to enlarge80m 0.5w Mini Transmitter by G3ZOI
This 80m ARDF transmitter was designed to be multi purpose, suitable for Classic, Sprint and FoxOring formats. Compact and lightweight and easy to deploy. Low component count. Multipurpose socket for charging/syncro/tune-up. Internal ATU for matching to a short wire antenna.

Click to enlarge80m 3W Transmitter ATX-80 by G3ZOI
The 80m TX described here is the well known ON7YD ATX-80 and timer, combined in a standard aluminium enclosure.

80m Fuchsjadsender mit optimaler Antenne durch DL2AVH
- einfacher und schneller Aufbau im Gelände
- einfache Antenne , 2m – Installationsrohr
- Fuchsjadsender Pout = 2 Watt

Klik voor vergrotingBuilt an 80m DSB transmitter - VK3XU's "simplex sidebander" by VK2TPM
Spurred on by the success and what I've learned from my battle with the Bitx20 I sat down and constructed a transmitter from scratch.
It's the "simplex sidebander" from Drew Diamond's "Radio projects for the amateur" first book.

Click to enlargeFox transmitter for 80m by PA3HCM
One of the members at the club pointed me at the so-called “OXO transmitter”. I looked it up at the internet, and immediately liked its simplicity. So I started to build it.

Click to enlargeFrequency agile 80 metre CW QRP transmitter by VK3YE

Click to enlargeFuchsjagdsender - Der kleine Fox durch DL1DMW
Wer schon einmal an einer Fuchsjagd teilgenommen hat, weiß, wie viel Spaß sie bereiten kann. Für die Fuchsjagden des Ortsvereins Soest, wurde dieser wenig aufwendige 80-m-Fuchs aus zwei vorhandenen Lösungen kombiniert.

Click to enlargeMicro beacon " Froggie" by OH1TV
This radio transmitter is just for fun. It sounds like a frog when it gives short signals on 3699kHz LSB every second or two.
Transmitting power is very small, less than 1mW. Useful tranmission distance is less than 50m.
Power consumption is very low. One LR20 battery (large 1.5V) can last more than a year.

Click to enlargeOARC-80 by WAØITP
This is a fun little QRP transmitter that was developed for a club project. I had wanted to try an oscillator on a chip, but had heard the Epson chips had phase shift problems.

Click to enlargeTAG 80 Transmitter by G4RAW
Original Circuit in SPRAT Summer 1994 Iss Nr 79
The original version was built on tag strip, hence the name.

Click to enlargeTen Minute Transmitter by G4RAW
Steve, G4RAW described this simple transmitter for 80 metres in Sprat 82 and describes how the World record for building a rig , actually a Oner, and having a QSO, is under 15 minutes.

Click to enlargeThe AA8V/W8EXI 6CL6 One-Tube Transmitter by AA8V
In December, 1998 I attended the annual Christmas banquet of the Cuyahoga Falls Amateur Radio Club. At that meeting I got a wonderful Christmas present: Jim Trutko, W8EXI, offered to give me much of his old homebuilt ("homebrew") amateur radio equipment.

Klik voor vergrotingThe Madagascar Mighty Mite by 5R8SV
Over the last few years, there have been a spate of postings from homebrewers taking inspiration from the Soldersmoke podcast to whip up various incarnations of the Michigan Mighty Mite, a very simple rock-bound QRPp transmitter.

Click to enlargeThe Nipper 3.5MHz Transmitter
I think that this circuit was developed by G3ROO but my notes are lacking in this information.

Click to enlargeYour first transmitter by PA3HCM
With just a few components, you can make your own morse code transmitter. The output is only a few miliwatts, but this is enough to receive on any radio in your home.

Creation date : 12/08/2007 @ 10:49
Last update : 19/09/2020 @ 23:39
Category : 80m Projects
Page read 34903 times

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